Royal wedding: Photographer reveals story behind the day's most iconic photo

Prince Harry and Meghan Markle's royal wedding brought about a slew of instantly iconic moments on Saturday, but there is one photo that keeps on getting posted and shared all around the world, and now we know the story behind how it came to be.

The photo in question shows Meghan and Harry holding hands in their carriage as they left St. George's Chapel at Windsor Castle -- but it's the angle of the shot from overheard that really makes it. The picture was taken by UK-based Press Association photographer Yui Nok, who tweeted the story behind the incredible photo.

"I was positioned on the roof of George IV Gateway of Windsor Castle, and they passed directly beneath me during their carriage procession," he explained. "I had less than a one-second window to take that particular shot -- whilst having to focus through a metal grill I was standing over -- so was happy to get anything really!"

See the photo at the front of the gallery below:

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The best photos from Meghan and Harry's royal wedding

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The best photos from Meghan and Harry's royal wedding

Prince Harry, Duke of Sussex and the Duchess of Sussex hold hands in the Ascot Landau Carriage as their carriage procession rides along the Long Walk, on May 19, 2018 after their wedding ceremony.

(Photo by Yui Mok - WPA Pool/Getty Images)

Britain's Prince Harry, Duke of Sussex and his wife Meghan, Duchess of Sussex emerge from the West Door of St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018 after their wedding ceremony.

(Photo by Ben Birchall / POOL / AFP)

Ms. Meghan Markle walks down the aisle at the start of her wedding to Prince Harry in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England.

(Photo by Danny Lawson - WPA Pool/Getty Images)

Britain's Prince Harry, Duke of Sussex and his wife Meghan, Duchess of Sussex leave from the West Door of St George's Chapel, Windsor Castle, in Windsor on May 19, 2018 in Windsor, England.

(Photo by Ben STANSALL - WPA Pool/Getty Images)

The Duke and Duchess of Sussex on the steps of St George's Chapel at Windsor Castle following their wedding ceremony in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England.

(Photo by Danny Lawson - WPA Pool/Getty Images)

Prince Harry, Duke of Sussex and The Duchess of Sussex leave St George's Chapel, Windsor Castle after their wedding ceremony on May 19, 2018 in Windsor, England.

(Photo by Andrew Matthews - WPA Pool/Getty Images)

Princess Charlotte sticks out her tongue as she rides in a car to the wedding of Prince Harry and Meghan Markle at St George's Chapel in Windsor Castle on May 19, 2018 in Windsor, England.

(Photo by Andrew Milligan - WPA/Getty Images)

Britain's Prince Harry, Duke of Sussex kisses his wife Meghan, Duchess of Sussex as they leave from the West Door of St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018 after their wedding ceremony.

(Photo by Danny Lawson / POOL / AFP)

Britain's Prince Harry, Duke of Sussex and his wife Meghan, Duchess of Sussex wave from the Ascot Landau Carriage during their carriage procession on Castle Hill outside Windsor Castle in Windsor, on May 19, 2018 after their wedding ceremony.

(Photo by Paul ELLIS / POOL / AFP)

US actress Meghan Markle, accompanied by Britain's Prince Charles, Prince of Wales walks down the aisle toward her husband-to-be Britain's Prince Harry, Duke of Sussex, in St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018 during their wedding ceremony.

(Photo by Dominic Lipinski / POOL / AFP)

Meghan Markle and her mother, Doria Ragland, are driven along the Long Walk as they arrive for her wedding ceremony to marry Britain's Prince Harry, Duke of Sussex, at St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018.

(Photo by EMMANUEL DUNAND / AFP)

Prince Harry and Meghan Markle during their wedding service, conducted by the Archbishop of Canterbury Justin Welby in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England.

(Photo by Dominic Lipinski - WPA Pool/Getty Images)

Princess Charlotte on the steps of St George's Chapel after the wedding of Prince Harry and Meghan Markle in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England.

(Photo by Jane Barlow - WPA Pool/Getty Images)

Britain's Prince Harry, Duke of Sussex and his wife Meghan, Duchess of Sussex emerge from the West Door of St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018 after their wedding ceremony.

(Photo by Ben STANSALL / POOL / AFP)

Meghan Markle is driven to St George's Chapel in Windsor Castle along with her page boys Brian and John Mulroney at St George's Chapel at Windsor Castle before the wedding of Prince Harry to Meghan Markle on May 19, 2018 in Windsor, England.

(Photo by Toby Melville- WPA Pool/Getty Images)

Britain's Prince Harry, Duke of Sussex and Meghan Markle, Duchess of Sussex, stand together at the altar in St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018 during their wedding ceremony.

(Photo by Dominic Lipinski / POOL / AFP)

Prince Harry, arrives with his best man Prince William, Duke of Cambridge for the wedding ceremony of Prince Harry and US actress Meghan Markle at St George's Chapel, Windsor Castle on May 19, 2018 in Windsor, England.

(Photo by Odd Anderson - WPA Pool/Getty Images)

Britain's Prince Harry, Duke of Sussex and his wife Meghan, Duchess of Sussex arrive back at Windsor Castle in the Ascot Landau Carriage after their wedding ceremony and after their procession in Windsor, on May 19, 2018.

One fan of the photograph pointed out that Harry and Meghan's positioning almost forms a heart, which Nok said was "purely coincidental."

"For that shot I used @CanonUKandIE 1Dx Mk2 camera and a 70-200mm lens," he said of the shot's specifics. "For other shots I had the @CanonProNetwork 600mm F4 (which is actually quite light for its size – just as well as I had to handhold it a lot of the time!) Drones would never have been allowed anywhere near."

Thanks, glad you like the photo. It was taken by myself, and I'm a staff photographer for @PA based in the UK. I was positioned on the roof of George IV Gateway of Windsor Castle, and they passed directly beneath me during their carriage procession. https://t.co/hkzViNhSbb

WINDSOR, ENGLAND - MAY 19: Meghan, Duchess of Sussex in the Ascot Landau carriage during the procession on The Long Walk after getting married St George's Chapel, Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Richard Heathcote/Getty Images)

Britain's Prince Harry, Duke of Sussex (L) and Britain's Meghan Markle, Duchess of Sussex, (R) walk away from the High Altar toward the West Door to exit at the end of their wedding ceremony in St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018. (Photo by Owen Humphreys / POOL / AFP) (Photo credit should read OWEN HUMPHREYS/AFP/Getty Images)

WINDSOR, UNITED KINGDOM - MAY 19: Meghan Markle stands at the altar during her wedding in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Jonathan Brady - WPA Pool/Getty Images)

WINDSOR, UNITED KINGDOM - MAY 19: Prince Harry lifts the veil of Meghan Markle during their wedding ceremony in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Owen Humphreys - WPA Pool/Getty Images)

WINDSOR, UNITED KINGDOM - MAY 19: Prince Harry looks at his bride, Meghan Markle during their wedding service conducted by the Archbishop of Canterbury Justin Welby in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Owen Humphreys - WPA Pool/Getty Images)

Britain's Prince Harry, Duke of Sussex (L) and US fiancee of Britain's Prince Harry Meghan Markle stand together at the High Altar during their wedding ceremony in St George's Chapel, Windsor Castle, in Windsor, on May 19, 2018. (Photo by Dominic Lipinski / POOL / AFP) (Photo credit should read DOMINIC LIPINSKI/AFP/Getty Images)

WINDSOR, UNITED KINGDOM - MAY 19: Prince Harry places the wedding ring on the finger of Meghan Markle during their wedding service, conducted by the Archbishop of Canterbury Justin Welby in St George's Chapel at Windsor Castle on May 19, 2018 in Windsor, England. (Photo by Jonathan Brady - WPA Pool/Getty Images)

Prince Harry and Meghan Markle in St George's Chapel at Windsor Castle during their wedding.

WINDSOR, ENGLAND - MAY 19: Meghan Markle (R) with her mother Doria Ragland arrive at Windsor Castle ahead of her wedding to Prince Harry on May 19, 2018 in Windsor, England. Prince Henry Charles Albert David of Wales marries Ms. Meghan Markle in a service at St George's Chapel inside the grounds of Windsor Castle. Among the guests were 2200 members of the public, the royal family and Ms. Markle's Mother Doria Ragland. (Photo by Samir Hussein/WireImage)

WINDSOR, ENGLAND - MAY 19: Meghan Markle with her mother Doria Ragland (unseen) drive down the Long Walk as they arrive at Windsor Castle ahead of her wedding to Prince Harry on May 19, 2018 in Windsor, England. (Photo by Richard Heathcote/Getty Images)